Operation Characteristics of 1.3kW Class Anode-Supported Flat Tubular SOFC Stack

2010 ◽  
Author(s):  
Tak-Hyung Lim ◽  
Seok-Joo Park ◽  
Rak-Hyun Song ◽  
Seung-Bok Lee ◽  
Dong-Ryul Shin
Keyword(s):  
Simulation Technique ◽  
Maximum Power ◽  
Intermediate Temperature ◽  
Tubular Cells ◽  
Electrode Area ◽  
Induction Brazing ◽  
In Series ◽  
Operation Characteristics

KIER has fabricated anode-supported flat tubular SOFC stack for the intermediate temperature (700∼800°C) operation. For this purpose, we have first fabricated anode-supported flat tubular cells by the optimization between the current collecting method and the induction brazing process. After that we designed the compact fuel & air manifold by adopting the simulation technique to uniformly supply fuel & air gas and the unique seal & insulation method to make the more compact stack. For making stack, the prepared anode-supported flat tubular cells with effective electrode area of 108cm2 connected in series with 37 bundles, in which one bundle consists of two cells connected in parallel. The performance of stack in 3% humidified H2 and air at 800°C showed maximum power of 1.3kW.

scholarly journals High-Flexibility MPPT Techniques with Communication Scan Network for PV Micro-Grid System

Processes ◽  
2022 ◽  
Vol 10 (1) ◽  
pp. 117
Author(s):  
Yu-Kai Chen ◽  
Hong-Wen Hsu ◽  
Chau-Chung Song ◽  
Yu-Syun Chen
Keyword(s):  
Output Voltage ◽  
High Efficiency ◽  
Maximum Power ◽  
Global Maximum ◽  
Switching Frequency ◽  
Grid System ◽  
Pv System ◽  
In Series ◽  
Micro Grid ◽  
High Flexibility

This paper proposes the design and implementation of inductor-inductor-capacitor (LLC) converters with modules connected in series with the power scan method and communication scan network (CSN) to achieve MPPT and regulate the output voltage for the PV micro-grid system. The Dc/Dc converters includes six isolated LLC modules in series to supply ±380 V output voltage and track the maximum power point of the PV system. The series LLC converters are adopted to achieve high efficiency and high flexibility for the PV micro-grid system. The proposed global maximum power scan technique is implemented to achieve global maximum power tracking by adjusting the switching frequency of the LLC converter. To improve the system flexibility and achieve system redundancy, module failure can be detected in real time with a communication scan network, and then the output voltage of other modules will be changed by adjusting the switching frequency to maintain the same voltage as before the failure. Additionally, the proposed communication scan network includes the RS-485 interface of the MPPT series module and the CAN BUS communication interface with other subsystems’ communication for the PV micro-grid application system. Finally, a 6 kW MPPT prototype with a communication scan network is implemented and the proposed control method is verified for the PV system.

Operation Characteristics of Tubular Segmented-In-Series Solid Oxide Fuel Cells (SOFC)

2019 ◽  
Vol 35 (1) ◽  
pp. 679-682
Author(s):  
Tak-Hyoung Lim ◽  
U. J. Yun ◽  
Jong-Won Lee ◽  
Seung-Bok Lee ◽  
Seok-Joo Park ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
In Series ◽  
Operation Characteristics

Individual solar cells balance for maximum power extraction in series arrays

2014 ◽  
Author(s):  
Hector G. Chiacchiarini ◽  
Jonatan G. Ceci ◽  
Alejandro R. Oliva ◽  
Pablo S. Mandolesi
Keyword(s):  
Solar Cells ◽  
Maximum Power ◽  
Power Extraction ◽  
In Series

scholarly journals Design of Converters for PV System Under Partial Shading Conditions

2017 ◽  
Vol 6 (2) ◽  
pp. 77
Author(s):  
M. Kowsalya ◽  
K. Balsubramanyam
Keyword(s):  
Power Level ◽  
Maximum Power ◽  
Duty Ratio ◽  
The Novel ◽  
Pv System ◽  
Partial Shading ◽  
Photovoltaic Modules ◽  
Bidirectional Converter ◽  
Control Scheme ◽  
In Series

This paper presents a maximum power generation with the interconnection of photovoltaic modules under partially shaded and/or mismatching conditions. The partial shading condition reduces power level of each module. The reduction in power due to the partial shading will be compensated by the bidirectional converter. The proposed system consisting of two and three PV modules connected in series under partial shading conditions which are capable of increasing the power levels up to 50% compared to conventional by-pass diode structure. In general ‘n’ number of modules connected in series so that the maximum power gain will be expected to (100/n) %. This is achieved by developing the new control strategy in which the correct adjustment of converter duty ratio under partially shading conditions. The novel control scheme is developed by using analysis of the power converters. The proposed scheme was verified in MATLAB/SIMULINK.

scholarly journals Numerical Modeling, Simulation and Evaluation of Conventional and Hybrid Photovoltaic Modules Interconnection Configurations under Partial Shading Conditions

2021 ◽  
Author(s):  
Faisal Saeed ◽  
Haider Ali Tauqeer ◽  
Hasan Erteza Gelani ◽  
Muhammad Hassan Yousuf
Keyword(s):  
Power Loss ◽  
Simulation Analysis ◽  
Maximum Power ◽  
Power Losses ◽  
Partial Shading ◽  
Power Characteristics ◽  
Pv Array ◽  
Pv Modules ◽  
In Series ◽  
Simulation And Evaluation

Partial shading on solar photovoltaic (PV) arrays is a prevalent problem in photovoltaic systems that impair the performance of PV modules and is responsible for reduced power output as compared to that in standard irradiance conditions thereby resulting in the appearance of multiple maximas on panel output power characteristics. These maxims contribute to mismatch power losses among PV modules. The mismatch losses depend on shading characteristics together with different interconnected configuration schemes of PV modules. The research presents a comparative analysis of partial shading effects on a 4 x4 PV array system connected in series(S), parallel (P), serries-parallel (SP),total-cross-tied (TCT),central-cross-tied(CCT),bridge-linked(BL),bridge-linked total cross-tied (BLTCT) ,honey-comb(HC), honey-comb total-cross-tied (HCTCT) and ladder (LD) configurations using MATLAB/Simulink. The PV module SPR-X20-250-BLK was used for modeling and simulation analysis. Each module is comprised of 72 number of PV cells and a combination of 16 PV modules was employed for the contextual analysis. Accurate mathematical modeling for the HCTCT configuration under partial shading conditions (PSCs) is provided for the first time and is verified from the simulation. The different configuration schemes were investigated under short-narrow,short-wide,long-narrow,long-wide, diagonal, entire row distribution, and entire column distribution partial shading condition patterns with mathematical implementation and simulation of passing clouds. The performance of array configurations is compared in terms of maximum power generated ), mismatch power loss (∆), relative power loss ) and the fill factor (FF). It was inferred that on average, TCT configuration yielded maximum power generation under all shading patterns among all PV modules interconnection configurations with minimum mismatch power losses followed by hybrid and conventional PV array configurations respectively.

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